This stylish helmet boasts a bottom white EPS liner covered with a soft PVC shell. The top PVC metallic soft shell is lined with 10 arctic cooling air vents. Features nylon webbing with plastic buckles and an adjustable dial retention system that allows for a tight, quick and comfortable adjustment. If the helmet does not fit snugly, replace the factory-installed pads with thicker pads, which are included. The helmet is designed to absorb the force of an impact through the crushing and partial destruction of the helmet liner, upon which it should be replaced. Clean with mild soap and water. Inside helmet circumference is 22" to 23-1/2". Please specify red or blue when ordering.